A sweeping new analysis by Kodiak Solutions — covering revenue cycle data from 2,300 hospitals and 350,000 physicians — has put a precise dollar figure on what the healthcare industry already knew was getting worse. In 2025, net revenue losses from final claim denials and bad debt grew by 25%, with providers collectively losing more than $48 billion in revenue they had already earned. The final denial rate at hospitals rose from 2.5% in 2024 to 2.7% in 2025 — a seemingly small shift that, at scale, represents tens of millions of dollars per health system. For the ASCs and specialty practices Cosentus serves, this data is not abstract. It is a direct reflection of the billing environment your revenue cycle team is operating in every day.
1. Denial Rates Are Climbing — Even as Payment Speed Improves
The Kodiak analysis reveals a troubling paradox: payers are paying faster, but denying more. Cash flow metrics improved modestly in 2025 as insurers accelerated payment timelines on clean claims. But the gains from faster payment were more than offset by the surge in clinical denials — particularly those tied to prior authorization requirements and medical necessity determinations. Providers who measured performance by days in A/R saw green on their dashboards while the harder-to-track final denial rate quietly climbed.
This dynamic is especially dangerous for specialty practices. In orthopedics, anesthesia, pain management, and cardiology — where procedures are high-cost and frequently subject to prior authorization — a clinical denial is not a minor inconvenience. It is a delayed or lost payment on a case that consumed significant clinical and administrative resources. The practices most exposed to this risk are those without systematic denial tracking and appeal workflows built specifically around their specialty’s payer landscape.
2. $48 Billion in Losses — Who Is Absorbing the Damage
The $48 billion figure in the Kodiak report represents losses from two sources: final claim denials that were never recovered, and bad debt write-offs tied to uncompensated care. This is up from $38.6 billion in 2024 — a $9.4 billion increase in a single year. Final denials, by definition, are claims that were denied and never successfully appealed or resubmitted. They represent revenue that providers gave up on — either because the appeal process was too resource-intensive, the timeline expired, or the administrative bandwidth simply was not there.
For independent ASCs and specialty groups operating with lean billing teams, this is where the real damage happens. Large health systems have dedicated denial management departments. Smaller practices often do not — which means denials pile up, appeal windows close, and revenue that was clinically earned and properly coded is written off as uncollectable. The Kodiak data makes clear that this is not a minor operational inefficiency. It is a structural revenue crisis that compounds year over year.
3. Clinical Denials Are the Fastest-Growing Problem
Not all denials are equal, and the Kodiak report draws an important distinction. Administrative denials — claim rejections due to coding errors, eligibility issues, or missing information — have always been part of the revenue cycle landscape and are largely preventable with good front-end processes. Clinical denials, however, are different. They represent payer determinations that a service was not medically necessary, not appropriate for the setting, or not covered under the patient’s plan terms.
Clinical denials are harder to prevent, more expensive to appeal, and increasingly the tool payers are using to reduce reimbursement without renegotiating contracts. In the prior authorization context, they often arrive after a service has already been rendered — leaving the practice holding a denied claim for a procedure that was appropriately ordered and competently performed. The 2025 growth in clinical denials tracked by Kodiak reflects a deliberate escalation of this tactic by commercial payers and Medicare Advantage plans, and it is accelerating.
4. Medicare Advantage Plans Are Driving the Surge
Medicare Advantage plans have consistently been the most aggressive denier of claims, and 2025 data reinforces this trend. MA plans denied 4.1 million prior authorization requests — representing 7.7% of all requests — in 2024 alone, according to KFF data cited alongside the Kodiak findings. As of 2026, 19 major health systems have dropped one or more MA plans from their networks, citing persistent frustrations with denial rates and slow adjudication.
For specialty practices with significant MA patient volume — particularly in orthopedics and cardiology, where elective and semi-elective procedures are common — this environment requires a fundamentally different revenue cycle approach. Prior authorization tracking, proactive appeal filing, and MA-specific coding documentation cannot be afterthoughts. They need to be built into the billing workflow from the first patient touchpoint, not addressed reactively after a denial lands.
5. The Compounding Effect: Why This Gets Worse Each Year
One of the most important insights in the Kodiak analysis is the compounding nature of denial-driven revenue leakage. Each year that final denial rates increase, a larger base of lost revenue accumulates. Practices that do not systematically address their denial pipeline do not start each year with a clean slate — they carry forward the cumulative impact of uncollected claims, eroding their effective reimbursement rate on an ongoing basis. The 25% year-over-year increase in net revenue leakage is not a one-time event. It is the visible output of a structural problem that compounds unless actively managed.
This compounding effect also has downstream consequences on practice viability. Shrinking effective reimbursement rates reduce the financial cushion that practices need to invest in staffing, equipment, and capacity. Practices that absorb mounting denial losses without addressing root causes often find themselves in a cycle of cost-cutting that further reduces their ability to pursue revenue recovery — ultimately threatening the long-term sustainability of independent specialty care.
What This Means for Specialty Practices
The Kodiak data is a wake-up call for every specialty practice still treating denial management as a back-office cleanup function rather than a front-line revenue strategy. The $48 billion in 2025 losses represents revenue that was clinically earned, properly documented, and then lost — not because the care was inappropriate, but because the revenue cycle process failed to recover it. For ASCs and specialty groups, the response cannot be to simply accept higher denial rates as the new normal. It requires a systematic, specialty-specific approach to prior authorization tracking, clinical denial appeals, and real-time denial pattern monitoring that most independent practices cannot build in-house.
How Cosentus Helps
Cosentus provides end-to-end revenue cycle management for ASCs and specialty practices — built specifically to fight the denial environment the Kodiak report describes:
- Clinical Denial Management: We track every denial by payer, procedure, and denial reason code — identifying patterns before they become write-offs and filing appeals within specialty-specific timelines.
- Prior Authorization Tracking: Our team manages prior auth workflows from submission to decision, ensuring no case enters the OR without a complete authorization trail and no denial goes unchallenged.
- Medicare Advantage Expertise: We know how MA plans deny, how they adjudicate appeals, and how to document medical necessity in the language payers respond to — specialty by specialty.
- Denial Prevention at the Front End: We scrub claims for clinical and administrative denial triggers before submission, reducing the clean claim failures that create the administrative denial backlog.
- Recovery Reporting: We give practice leadership a real-time view of denial rates, appeal outcomes, and recovery performance — so you always know where your revenue stands, not just where your A/R does.
See how Cosentus reduces denial losses for specialty practices: cosentus.com/contact
